The cement industry at a turning point: A path toward value ...

The companies have pursued the majority of deals during periods when valuations were high, which had a negative impact on balance sheets and, eventually, economic profit. As a consequence, after a short phase of high returns during the economic boom before the financial crisis, industry ROIC after 2009 has again fallen below the cost of capital.

Sustainability value of concrete : GCCA

Concrete has a leading role to play in meeting the big challenges we face today – whether its population growth, rapid urbanisation or adapting to increasingly extreme weather events. When taking the performance of a building over its whole lifecycle into account, concrete offers significant sustainability benefits over other building materials thanks to its innate properties, such as its durability, its thermal mass, its recyclability, and its carbon uptake. Meanwhile, its flexibility and versa

Concrete Plant - an overview | ScienceDirect Topics

To evaluate the influence of the aggregate transport distance on the environmental impacts of concrete production, the transport distance of natural and recycled aggregates from the place of extraction or recycling plant (in this case, demolition site) to the concrete plant is varied from 0 km to 150 (200) km. Results for each impact category ...

Concrete Environmental Issues & The Ideal Concrete Plant

Plant siting and construction was done with the environment in mind. Green areas remain, providing some wildlife habitat, a buffer of thick screening vegetation was preserved along property lines reducing noise and visual impact, and as much pervious concrete on the plant site as possible was used. Knowledgeable staff members.

Environmental impact of concrete - Wikipedia

What are the environmental impacts of concrete?

Health effects for the population living near a cement plant ...

May 01, 2012 · 1. Introduction. A cement plant can be an important source of air pollutants. Few studies have focused on the health effects attributable to the emissions of a cement plant on the population living in the proximity (Rovira et al., 2010, Schuhmacher et al., 2004), some of them investigating different outcomes, such as respiratory symptoms (Legator et al., 1998), preterm delivery (Yang et al ...

Garden Guides | The Effect of Concrete on Plant Growth

Among the most widely known consequences of concrete surfaces or debris in a garden setting is increase in pH, making the soil more alkaline, according to the University of Florida. Cement and other aggregates in concrete contain limestone. Ulrich Lorimer writes in "Community Gardening" that water runoff from concrete also supplies nearby plants with altered pH. Alkaline soils limit the availability of certain nutrient ions for plant roots to absorb. Thus, a nutrient deficiency, such as yellowin

Top 4 Environmental Compliance Issues at Concrete Plants

Obviously each concrete facility is going to have its own environmental issues and problems, but I find these to be universally common at most concrete facilities I visit that are struggling with basic environmental compliance. To learn more about environmental issues at concrete plants, click here to contact us or give us a call at 609-693-8301.

Environmental Protection of Concrete Batching Plant

The environmental protection work of concrete batching plants is very important, do the work of prevention can reduce the impact on the health of workers on the one hand, on the other hand you can also achieve the effect of reduced product waste, and we hope the above will help you.

impact or crushing value conccret value

An impact value is measured as of aggregates passed through the 236mm sieve w2 to the total weight of the sample w1 aggregate impact value the value of aggregate impact test w1w the value of aggregate impact test should not be more than 45 by weight of aggregates, used for concrete other than wearing surface.

Gradation of Aggregates and its Effects on Properties of Concrete

Aggregate is another significant constituent of concrete which takes up to 60-90% of total concrete volume [6] and its gradation has a huge impact on characteristics of concrete [7]. In recent ...

Concrete: the most destructive material on Earth | US news ...

Feb 25, 2019 · After water, concrete is the most widely used substance on Earth. If the cement industry were a country, it would be the third largest carbon dioxide emitter in the world with up to 2.8bn tonnes ...

Types and Causes of Concrete Deterioration

concrete, the passive corrosion rate is typically 0.1 µm per year. Without the passive film, the steel would corrode at rates at least 1,000 times higher (ACI 222 2001). Because of concrete’s inherent protection, reinforcing steel does not corrode in the majority of concrete elements and structures.

ENVIRONMENTAL IMPACT OF CONCRETE RECYCLING, COMING FROM ...

Programme (BOE, 2001) to increase these values, so as to recycle at least 40% by 2005, and 60% by the year 2006. In the composition of conventional demolition waste, a high proportion of the weight is formed by concrete. Average values of 35% of the total C&DW were estimated in 1990, with predicted values of 40% by the year 2000. (D.

Slump adjustment is a fact of life for concrete contractors ...

batch plants, batching tolera n c e s can affect slump control. To l e r - ances for the individual batching of each mix ingredient are given be-l o w (Ref. 1). Examples of how each t o l e r ance affects the batch we i g h t s of a typical 3500-psi concrete mix also are show n . • Cementitious materials - 1% (5 pounds of cement per cubic yard)